摘要
Uniform and monodisperse ZnSn（OH）6 perfect octahedrons have been synthesized by a facile coprecipitation reaction process. The particle size of the asprepared ZnSn（OH）6 octahedral structure can be readily controlled by adjusting the reaction temperature （T）, and the side length of ZnSn（OH）6 octahedrons was tailored from 3 pm （40℃） to 4 pm （60℃） and 5 μm （80℃）. The ethanol sensing properties of ZnSn（OH）6 octahedrons were carefully investigated. The gas sensing experimental data show that the sensor based on ZnSn（OH）6 （40℃） has good selectivity, fast response/recovery time and the highest response （Ra/Rg = 23.8） to 200 ppm ethanol at relatively low optimum operating temperature （200℃） compared to sensors based on ZnSn（OH）6 （60℃） and ZnSn（OH）6 （80℃）, which might result from different specific surface areas. The study demonstrated that perfect octahedral ZnSn（OH）6 with controlled crystalline size and desirable sensing performance can be synthesized by a simple fabrication procedure, and the octahedral ZnSn（OH）6 could be a highly promising material for high-performance sensors.
Uniform and monodisperse ZnSn（OH）6 perfect octahedrons have been synthesized by a facile coprecipitation reaction process. The particle size of the asprepared ZnSn（OH）6 octahedral structure can be readily controlled by adjusting the reaction temperature （T）, and the side length of ZnSn（OH）6 octahedrons was tailored from 3 pm （40℃） to 4 pm （60℃） and 5 μm （80℃）. The ethanol sensing properties of ZnSn（OH）6 octahedrons were carefully investigated. The gas sensing experimental data show that the sensor based on ZnSn（OH）6 （40℃） has good selectivity, fast response/recovery time and the highest response （Ra/Rg = 23.8） to 200 ppm ethanol at relatively low optimum operating temperature （200℃） compared to sensors based on ZnSn（OH）6 （60℃） and ZnSn（OH）6 （80℃）, which might result from different specific surface areas. The study demonstrated that perfect octahedral ZnSn（OH）6 with controlled crystalline size and desirable sensing performance can be synthesized by a simple fabrication procedure, and the octahedral ZnSn（OH）6 could be a highly promising material for high-performance sensors.
